Non-resettable heat responsive safety switch

Details Non-resettable heat responsive safety switch Non-resettable heat responsive safety switch

1975-09-08

1977-05-24

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

337409, H01H 3776

Patent

active

040258890

ABSTRACT:
A non-resettable heat responsive safety switch featuring two contact sleeves inside a jacket with a displaceable intermediate contact body of metal granulate, a preloaded compression spring biasing the contact body in the direction of contact interruption, a normally solid trigger body of fusible material holding the contact body in its normal, sleeve-bridging position, against the spring bias, until, at a critical temperature level, the trigger body yields to the spring which moves the contact body and breaks contact in the switch.

REFERENCES:
patent: 3727164 (1973-04-01), Cartier et al.
patent: 3820050 (1974-06-01), Tyler et al.
patent: 3821685 (1974-06-01), Kimball et al.

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